code: def read(self):
      return b"xyz"
  
file_path: MONAILabel/tests/unit/endpoints/test_proxy.py
imports: import unittest
  from types import SimpleNamespace
  from unittest.mock import patch
  from .context import BasicEndpointTestSuite
label_desc: Use image node_id 1 for calling the RawData obj's underlying member method code with example usage: obj.read() and returns: bytes